Fixing WD Black SN850X 2TB cache lag in Naraka Bladepoint
Every time I popped an ultimate, the grass textures would start flickering like crazy, which was honestly making me anxious during ranked matches. Once the SLC cache on the SN850X hits its threshold after a long session, the write speed craters from 6600MB/s down to 1500-1800MB/s, causing a massive bottleneck in resource streaming. I tried lowering the texture quality in-game, which gave me maybe 5 more FPS, but the game looked like a potato, so that was a huge disappointment. Instead, I went into Device Manager and forced the NVMe controller's write cache flush policy to 'Enabled' and flashed the latest official firmware. Monitoring with RTSS, my frame times tightened up from a wild 15-40ms swing to a consistent 12-16ms, and the flickering stopped. I actually made it worse at first by accidentally disabling the write cache entirely, which caused a full system crash during map loads, but it's stable now. Drive temps are between 52-58℃ with power fluctuations within 8W. 3DMark storage benchmarks confirm the I/O is optimized, and the input lag is finally gone.
